Welcome to the Community!
For modifying and or checking any account related information, you may find the below Community articles helpful:
Once payment is made it may take 10-15mins to restore the service, you may also perform power cycle to the modem/router in the event the service did not restore automatically after processing the payment.
To those having connection issue, we recommend the best thing to do first is check if there's an outage on the NBN network.
We have created this article that can guide you on How to Check for NBN Network Outage
If there are no known outages in your area you may perform basic troubleshooting, we did an article that you may find helpful see this link below.
Should you need further assistance, feel free to search community for help or chat with us at https://www.tpg.com.au/support/contact/